I just bought the Britax HL178PH4 but I have to admit that I'm not entirely comfortable with a flat clear lense, I'm used to not seeing the bulb.
If I had my time again I would go for the Cibies;
http://www.ebay.co.uk/itm/Cibie-7-Di...item5ae28d7ea6
More low tech than the Britax but still an excellent quality product.
As for globes, the IPF fatboys can't be beat. If they are outside your budget then the Britax X-ray vision Outbacks.